[ 38.502295] BUG: Bad rss-counter state mm:00000000634a9dea type:MM_FILEPAGES val:33 [ 38.502993] BUG: Bad rss-counter state mm:00000000634a9dea type:MM_ANONPAGES val:22 [ 38.664867] ================================================================== [ 38.665480] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.666169] Read of size 8 at addr ffff88800fcaf968 by task sshd/222 [ 38.666657] [ 38.666800] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.667385] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.667973] Call Trace: [ 38.668169] [ 38.668371] dump_stack_lvl+0x91/0xf0 [ 38.668696] print_report+0xcc/0x620 [ 38.668998] ? __virt_addr_valid+0x102/0x340 [ 38.669342] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.669806] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.670475] kasan_report+0xbe/0xf0 [ 38.670773] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.671158] vma_interval_tree_remove+0xc75/0xec0 [ 38.671558] vma_prepare+0xc54/0x11a0 [ 38.671855] __split_vma+0x5af/0x950 [ 38.672150] ? __pfx___split_vma+0x10/0x10 [ 38.672502] ? find_held_lock+0x2c/0x110 [ 38.672841] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.673208] ? lock_is_held_type+0x9f/0x120 [ 38.673564] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.674041] ? mtree_range_walk+0x632/0x900 [ 38.674407] ? mas_walk+0x5c7/0x7c0 [ 38.674718] do_vmi_munmap+0x1f1/0x2b0 [ 38.675045] mmap_region+0x1f9/0x2660 [ 38.675367] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.675704] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.676145] ? __pfx_lock_acquire+0x10/0x10 [ 38.676480] ? __pfx_mmap_region+0x10/0x10 [ 38.676811] ? security_mmap_addr+0x7d/0xa0 [ 38.677161] ? get_unmapped_area+0x1f5/0x3f0 [ 38.677529] do_mmap+0x854/0xf00 [ 38.677891] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.678214] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.678578] ksys_mmap_pgoff+0x3af/0x500 [ 38.678911] do_syscall_64+0x3f/0x90 [ 38.679230] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.679640] RIP: 0033:0x7f3b88e2cd82 [ 38.680017] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 38.681366] RSP: 002b:00007ffe4fc762c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.681999] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3b88e2cd82 [ 38.682551] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3b88266000 [ 38.683092] RBP: 00007f3b88266000 R08: 0000000000000009 R09: 0000000000001000 [ 38.683616] R10: 0000000000000812 R11: 0000000000000206 R12: 000055836e79ff70 [ 38.684165] R13: 00007ffe4fc762e0 R14: 00007ffe4fc76310 R15: 00007ffe4fc76670 [ 38.684722] [ 38.684918] [ 38.685060] Allocated by task 213: [ 38.685359] kasan_save_stack+0x22/0x50 [ 38.685760] kasan_set_track+0x25/0x30 [ 38.686081] __kasan_slab_alloc+0x59/0x70 [ 38.686455] kmem_cache_alloc+0x16b/0x370 [ 38.686796] vm_area_dup+0x20/0x160 [ 38.687099] __split_vma+0x170/0x950 [ 38.687414] split_vma+0xc6/0x110 [ 38.687705] mprotect_fixup+0x8d2/0xb30 [ 38.688038] do_mprotect_pkey+0x87e/0xd40 [ 38.688377] __x64_sys_mprotect+0x78/0xc0 [ 38.688702] do_syscall_64+0x3f/0x90 [ 38.688999] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.689443] [ 38.689586] Freed by task 213: [ 38.689918] kasan_save_stack+0x22/0x50 [ 38.690244] kasan_set_track+0x25/0x30 [ 38.690613] kasan_save_free_info+0x2b/0x50 [ 38.690957] __kasan_slab_free+0x10a/0x190 [ 38.691306] kmem_cache_free+0x10d/0x4d0 [ 38.691643] rcu_core+0x8c8/0x2860 [ 38.691939] __do_softirq+0x1b7/0x7d4 [ 38.692249] [ 38.692385] Last potentially related work creation: [ 38.692748] kasan_save_stack+0x22/0x50 [ 38.693069] __kasan_record_aux_stack+0x8e/0xa0 [ 38.693447] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.693961] remove_vma+0x139/0x170 [ 38.694271] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.694646] do_vmi_munmap+0x1f1/0x2b0 [ 38.694962] __vm_munmap+0x138/0x3a0 [ 38.695269] __x64_sys_munmap+0x59/0x80 [ 38.695637] do_syscall_64+0x3f/0x90 [ 38.695943] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.696341] [ 38.696475] The buggy address belongs to the object at ffff88800fcaf910 [ 38.696475] which belongs to the cache vm_area_struct of size 168 [ 38.697414] The buggy address is located 88 bytes inside of [ 38.697414] freed 168-byte region [ffff88800fcaf910, ffff88800fcaf9b8) [ 38.698410] [ 38.698553] The buggy address belongs to the physical page: [ 38.698977] page:000000004f5dbe08 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfcaf [ 38.699683] memcg:ffff88800fdbe101 [ 38.699950] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.700355] page_type: 0xffffffff() [ 38.700637] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 38.701209] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fdbe101 [ 38.701850] page dumped because: kasan: bad access detected [ 38.702274] [ 38.702418] Memory state around the buggy address: [ 38.702783] ffff88800fcaf800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 38.703310] ffff88800fcaf880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 38.703958] >ffff88800fcaf900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.704498] ^ [ 38.705000] ffff88800fcaf980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 38.705557] ffff88800fcafa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.706129] ================================================================== [ 38.706897] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 41.533588] BUG: Bad rss-counter state mm:00000000d77d5464 type:MM_FILEPAGES val:33 [ 41.534332] BUG: Bad rss-counter state mm:00000000d77d5464 type:MM_ANONPAGES val:22 [ 42.121357] BUG: Bad rss-counter state mm:00000000381a91a3 type:MM_FILEPAGES val:33 [ 42.122067] BUG: Bad rss-counter state mm:00000000381a91a3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61279' (ECDSA) to the list of known hosts. 2023/06/20 10:00:50 fuzzer started 2023/06/20 10:00:50 dialing manager at localhost:44161 2023/06/20 10:00:50 checking machine... 2023/06/20 10:00:50 checking revisions... [ 42.980089] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:00:50 testing simple program... [ 43.026675] cgroup: Unknown subsys name 'net' [ 43.151256] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:00:50 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800fe2c000 RCX=1ffffffff0ba7a02 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff81837c8a RBP=ffff888016777d90 RSP=ffff888016777be0 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=000055a255d5116a R12=ffffea0000698b80 R13=0000000000000cc0 R14=ffffea0000000000 R15=ffffea00005c6a00 RIP=ffffffff8183c818 RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f8917fa6900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007ffd300595e8 CR3=00000000167d2000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000288 RCX=0000000000000000 RDX=ffffffff87b67200 RSI=1ffff1100d9e6c39 RDI=ffffffff85d3bed0 RBP=00000000000361a0 RSP=ffff88800fdef738 R8 =ffff88806cf361c8 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00322e6f732e3436 R12=0000000000000200 R13=ffff88800ca6f200 R14=0000000000000dc0 R15=ffff88806cf361a0 RIP=ffffffff8183a1df RFL=00000046 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f8917fa6900 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f89183d6790 CR3=000000001a25c000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=0000000000000340fffffffe7ffbfeff XMM01=00000000000000000000000000000000 XMM02=00000000000000020000000000000000 XMM03=00000000000000008000000000000006 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=2520737365726464616e657473696c00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000